12138654 has 16 divisors (see below), whose sum is σ = 26484480. Its totient is φ = 3678360.

The previous prime is 12138649. The next prime is 12138661. The reversal of 12138654 is 45683121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91894 + ... + 92025.

It is an arithmetic number, because the mean of its divisors is an integer number (1655280).

Almost surely, 2^12138654 is an apocalyptic number.

12138654 is an abundant number, since it is smaller than the sum of its proper divisors (14345826).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12138654 is a wasteful number, since it uses less digits than its factorization.

12138654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183935.

The product of its digits is 5760, while the sum is 30.

The square root of 12138654 is about 3484.0571177867. The cubic root of 12138654 is about 229.8212473755.

The spelling of 12138654 in words is "twelve million, one hundred thirty-eight thousand, six hundred fifty-four".